Gas separation – Two or more separators – Spaced for parallel flow of gas
Reexamination Certificate
2006-01-10
2006-01-10
Smith, Duane (Department: 1724)
Gas separation
Two or more separators
Spaced for parallel flow of gas
C055S282300, C055S385300, C055S523000, C055SDIG010, C055SDIG030, C060S311000
Reexamination Certificate
active
06984253
ABSTRACT:
A honeycomb filter1,which comprises an integral structure of a plurality of honeycomb segments12bonded by an adhesive8.The honeycomb segment has numbers of through-holes3,which are surrounded by partition walls2and extend in the axial direction of the segment. The honeycomb filter is characterized in that a ratio of a thermal conductivity κ s of the honeycomb segment12to a thermal conductivity κ a of the adhesive8, κ s/κ a, is in a range of 5 to 300 and a density ρ a of the adhesive8is in a range of 0.1 to 4 g/cc. The honeycomb filter can prevent excessive temperature increase, can be low in non-uniformity of temperature distribution, and can be superior in durability.
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Gulati, “Strength and Thermal Shock Resistance of Segmented Wall-Flow Diesel Filters”, Corning Glass Works, pp 11-18.
Ichikawa Shuichi
Masukawa Naoshi
Greene Jason M.
NGK Insulators Ltd.
Oliff & Berridg,e PLC
Smith Duane
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